Mettler Toledo Division 2 IND570 Serie Guia De Instalacion página 16

the power phased connectors. The power phased connectors (neutral and line) shall be a minimum
2 2
of 0.9mm (size 18 AWG) and a maximum of 3.6mm (12 AWG) stranded wire. The protective
power ground shall be terminated to the grounding stud inside the harsh enclosure or the lower left
screw on the rear of the panel enclosure. Each point is labeled with a yellow and green ground
symbol.
The European and IECEx certification to the ATEX directive and IECEx standards require that all
glands and plugs on the harsh enclosure IND570xx be ATEX/IECEx certified increased safety glands
and plugs when the terminal is installed into a Zone 2 or Zone 22 area. The glands and plugs on
the ordinary location version IND570 are NOT ATEX/IECEx certified for increased safety.
The ATEX and IECEx certified version of the IND570xx harsh terminal includes an unterminated line
cord (without plug). Refer to Figure 2-2. The line cord must be terminated as defined by national
and/or local electrical standards to meet all required standards. The power requirements are listed
in Figure 2-1.
Figure 2-2: Line Cord for ATEX/IECEx Certified Harsh Enclosure
Table 2-1: Power Requirements
AC Voltage Current Frequency
50 / 60 Hz
100 – 240 VAC 0.5A
The ATEX and IECEx certified version of the IND570xx harsh terminal will be shipped with
ATEX/IECEx certified plugs installed in all option gland locations. A bag of ATEX/IECEx glands is
included with each unit and the glands must be installed during terminal installation based on the
connections used. Only glands that will be used should be installed.
Figure 2-3 shows an example of an ATEX/IECEx-certified increased safety "e" plug and gland with
the safety approval printed on them.
Figure 2-3: ATEX/IECEx-Certified Increased Safety Plug and Gland
The ATEX/IECEx glands should be installed in the locations shown in Figure 2-4 and torqued to the
specs shown in Table 2-2.
30205321 | 02 | 05/2017 METTLER TOLEDO IND570xx Division 2 and Zone 22 Installation Manual 2-3